return the numerator and denimentor

Hi everyone

Is there such a way to return the numerator and the denomenator of a given rational number

for example x = 1/2

I want to get n=1 , d=2

Answer 1

[John D'Errico]

Rat gives rational results for a floating point number, sometimes they are only approximate, of course.

[n,d] = rat(1/2)
n =
     1
d =
     2
     
[n,d] = rat(pi)
n =
   355
d =
   113

[Fatma Alnabrisi]

Thank you !

Answer 2

[Matt J]

If x is a symbolic variable, then yes

>> x=sym(1/2);
>> [n,d]=numden(x)
 
n =
 
1
 
 
d =
 
2

[Fatma Alnabrisi]

Thank you !